EP1493296A2 - Procede de mesure pendant une procedure de transfert dans un systeme de communications mobile - Google Patents
Procede de mesure pendant une procedure de transfert dans un systeme de communications mobileInfo
- Publication number
- EP1493296A2 EP1493296A2 EP03730298A EP03730298A EP1493296A2 EP 1493296 A2 EP1493296 A2 EP 1493296A2 EP 03730298 A EP03730298 A EP 03730298A EP 03730298 A EP03730298 A EP 03730298A EP 1493296 A2 EP1493296 A2 EP 1493296A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressed mode
- transmission
- tgpl
- tgl
- chosen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0094—Definition of hand-off measurement parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7087—Carrier synchronisation aspects
Definitions
- the present invention relates generally to mobile radio systems.
- the present invention is particularly applicable to CDMA systems (for
- Code Division Multiple Access such as in particular UMTS (for “Universal Mobile Telecommunication System”).
- a mobile radiocommunication system comprises, as shown in FIG. 1, a radio access subsystem itself comprising base stations (also called “Node B” in UMTS), and base station controllers (also called RNC, for "Radio Network Controller” in UMTS).
- the set formed by “Node B” and RNC is also called UTRAN, for "UMTS Terrestrial Radio Access Network”.
- the UTRAN is in relation on the one hand with mobile terminals (also called user equipment, or "User Equipment” or UE), and on the other hand with a network and switching subsystem (not illustrated specifically) .
- a technique commonly used in CDMA type systems such as in particular UMTS is the transmission technique according to a so-called compressed mode, in which a transmitter temporarily interrupts its transmission to a receiver on a given frequency to allow this receiver to perform other operations, such as in particular carrying out measurements on signals received at frequencies different from said given frequency. Transmission interruptions are also called "transmission gaps" in English.
- the compressed mode is used in the downward direction to allow a mobile terminal to carry out measurements on cells adjacent to a server cell, in particular for the preparation of handover.
- Such neighboring cells can be cells using the same radio access technology (or RAT, for "Radio Access Technology”) as said serving cell, or a different radio access technology.
- RAT Radio Access Technology
- the mode Compressed can be used to allow a UE to perform measurements on GSM cells using TDMA (“Time Division Multiple Access”) technology.
- the 3G TS 25.215 specification (the attached figure 2 of which is reproduced) notably defines the following compressed mode parameters:
- a UMTS frame comprises 15 time slots (or “time-slots"), the UMTS frame period, noted here TF_UMTS, is equal to 10 ms, and the UMTS time interval period, noted here TS_UMTS, is 10/15 ms, or approximately 0.667 ms.
- the measurements to be carried out by a UE on GSM cells include in particular the following two types of measurements: initial identification of the BSIC (or “initial BSIC identification”), reconfirmation of the BSIC (or “BSIC reconfirmation ").
- initial identification of the BSIC or "initial BSIC identification”
- reconfirmation of the BSIC or “BSIC reconfirmation”
- Station Identity Code is a code allowing mobile terminals to distinguish different cells using the same beacon frequency.
- the BSIC is broadcast on the beacon frequency of each cell, in a logical channel called SCH (" Synchronization CHannel ") transmitted over the time interval 0 of frames 1, 1 1, 21, 31 and 41 of the 51-frame multiframe as defined in the GSM system.
- a 51-frame multiframe comprises 51 frames each comprising 8 time intervals within which various signals called “bursts” are transmitted (in corresponding to different logical channels, the GSM multiframe period, noted here TMF_GSM, is approximately 235.38 ms, the GSM frame period, noted here TF_GSM, is approximately 4.615 ms, and the time interval period GSM, noted here TS_GSM, is approximately 0.577 ms.
- the performance requirements of a UE for the two measurements mentioned above are defined for certain configurations of compressed mode called reference. The required performance of a UE is only defined for these reference configurations, since it is of course not possible to test all the possible configurations of compressed mode. In particular, for each reference compressed mode configuration, two performance constraints are indicated:
- N__identify_abort this parameter indicates the maximum number of transmission interruption patterns that the UE must use to decode an unknown BSIC, in the initial BSIC identification procedure
- T_reconfirm_abort this parameter indicates the maximum time allowed for reconfirmation of the BSIC in the BSIC re-confirmation procedure.
- FCCH Frequency Correction CHannel
- the UE For the initial identification of the BSIC, or for the re-confirmation of the BSIC, the UE must then detect SCH bursts. To be able to carry out the measurements recalled above, it is therefore necessary that at least certain transmission interruptions (or "transmission gaps") among a set of consecutive transmission interruptions coincide with FCCH / SCH "bursts".
- the applicant has identified the following problems. For certain time difference values between GSM cells and UMTS cells, and for certain compressed mode configurations, it may happen that it is never possible to receive FCCH / SCH bursts during successive transmission interruptions. In particular, as observed by the applicant, this can occur for TGPL values multiple of 6, if TGL does not have a sufficiently high value.
- the present invention aims in particular to solve such problems.
- the present invention aims to optimize the choice of the reference compressed mode configurations in the type of application recalled above. More generally, the present invention aims to optimize the performance of compressed mode in such systems.
- One of the objects of the present invention is a compressed mode configuration method in a mobile radio system, method in which a compressed mode configuration is defined by compressed mode parameters, said compressed mode parameters including a TGL duration of transmission interruption and a duration of transmission interruption reason TGPL, said transmission interruptions being defined in a first transmission time structure specific to a first system and being determined relative to a second transmission time structure specific to a second system, to allow measurements to be made in the first system on the second system, method in which a compressed mode configuration is chosen from a set of so-called reference compressed mode configurations, method in which said compressed mode parameters are determined in such a way is that, for each reference configuration, if the TGPL duration is such that the transmission interruptions occur periodically at fixed positions in said second structure, then TGL is chosen to be large enough for two transmission interruptions occurring at two of said positions, the closest to each other, overlap, with a recovery time greater than the time necessary to carry out a measurement.
- said compressed mode parameters are determined so that, otherwise, for each reference configuration, TGPL is
- the first system is of the UMTS type
- the second system is of the GSM type
- TGL is chosen from the group comprising the values 1 1, 1 2, 13, 14.
- TGL preferably has the value 14.
- the first system is of the UMTS type
- the second system is of the GSM type
- TGPL is chosen not multiple of 6.
- TGPL is chosen from a group comprising the values 13, 14, 1 5, 16.
- TGL is chosen from a group comprising the values 5, 7, 10, 14 .
- TGL is chosen from a group comprising the values 7, 10, 14.
- the first system is of the UMTS type
- the second system is of the GSM type
- a pattern of transmission interruptions comprises two transmission interruptions.
- Another object of the invention is a compressed mode configuration method in a mobile radio system, method in which a compressed mode configuration is defined by compressed mode parameters, said compressed mode parameters including a TGL duration of transmission interruption and a duration of transmission interruption reason TGPL, said transmission interruptions being defined in a first transmission time structure specific to a first system and being determined relative to a second transmission time structure specific to a second system, to allow measurements to be made in the first system on the second system, method in which a compressed mode configuration is chosen from a set of mode configurations compressed called reference, process in which for at least one reference configuration, TGPL is chosen equal to 13 and TGL is chosen equal to 10.
- Another object of the present invention is network equipment for a mobile radio communication system, comprising means for implementing such a compressed mode configuration method.
- Another object of the present invention is a mobile terminal for a mobile radio communication system, comprising means for implementing such a compressed mode configuration method.
- FIG. 1 recalls the general architecture of a system of mobile radiocommunications such as in particular UMTS
- FIG. 2 recalls the parameters of compressed mode in a system such as in particular UMTS.
- the present invention will be more particularly described in the application example mentioned above where the compressed mode is used to allow a UE, in the UMTS system, to carry out measurements on GSM cells.
- the present invention can be explained as follows.
- TF_GSM 6 * TF_UMTS.
- TGPL a value of TGPL equal to 24 (that is to say a pattern of transmission interruptions of duration equal to 24 * TFJJMTS, or 24 * 10 ms, or 240 ms). If a transmission interruption for the first TGPL period occurs at a certain position in the GSM multiframe, the interruption of transmission for a next TGPL period (i.e. after 240 ms) will occur at the same position shifted by 24 * TF_UMTS - TMF_GSM, i.e.
- the sequence of positions of successive transmission interruptions in the GSM multiframe is periodic, that is to say that periodically the transmission interruptions are found at the same position in this multiframe.
- the GSM multiframe will be covered by only 235.38 / 4.615, or 51, transmission interruptions always occurring at fixed positions in this multiframe.
- the measurement time allowed by a transmission interruption is equal to TGL * TS_UMTS - 2 * Tcom, where Tcom is the time necessary for the UE to change frequency.
- Tcom is the time necessary for the UE to change frequency.
- this measurement time is 4.98 ms. This value being less than the 5.2 ms value obtained as explained above in the case of a TGPL value equal to 24, such a configuration therefore does not allow the UE to carry out the measurements on GSM cells in a finite time, and should therefore not be included in the reference configurations for which the performance required for a UE for the types of measures mentioned above is defined.
- the present invention proposes that said compressed mode parameters are determined so that, for each reference configuration, if the duration TGPL is such that the transmission interruptions occur periodically at fixed positions in said second structure, then TGL is chosen large enough so that two transmission interruptions occurring at two of said positions, closest to each other, overlap, with a recovery time greater than the time necessary to perform a measurement.
- the present invention further proposes that said compressed mode parameters are determined so that, otherwise, for each reference configuration, TGPL is chosen such that transmission interruptions do not occur periodically at fixed positions in said second structure , or otherwise a reason for transmission interruptions includes several transmission interruptions.
- the transmission interruptions must be sufficiently superimposed. In this case it is necessary that the duration of recovery of two transmission interruptions occurring at two of said positions, closest to each other, be greater than the time necessary to perform a measurement.
- a TGPL duration such that transmission interruptions occur periodically at fixed positions in the GSM multiframe corresponds to a TGPL value multiple of 6.
- the time required to perform a measurement is equal to
- Tcom corresponds to the time necessary for the UE to change frequency.
- the present invention can also be explained as follows.
- the present invention provides a choice of TGL value for choosing any value for TGPL.
- the present invention proposes that TGL be chosen to be greater than 1 1, that is to say that TGL is equal to one of the values 1 1, 12, 13, 14, since the maximum value of TGL in UMTS is equal to 14.
- the present invention proposes to choose TGPL not multiple of 6. In this case, the constraints on TGL exposed previously n ' don't need to be checked.
- the value TGPL can be chosen equal to one of the values 13, 14, 15 or 16. In this case, low values of TGL can be chosen. Examples are given in the following table:
- the present invention proposes to provide two transmission interruptions (or “transmission gaps”) in a transmission interruption pattern (or “transmission gap pattern”), so as also to reduce the probability that the measurements cannot be performed.
- a pattern of transmission interruptions may include two transmission interruptions.
- the present invention also relates, in addition to a compressed mode configuration method as set out in the above, a mobile radio communication system, network equipment (such as in particular a base station controller, or RNC in a system such as UMTS), and a mobile terminal (such as in particular UE in a system such as UMTS), all comprising means adapted to implement such a method.
- network equipment such as in particular a base station controller, or RNC in a system such as UMTS
- a mobile terminal such as in particular UE in a system such as UMTS
- the particular production of such means does not present any particular difficulty for the skilled person, such means do not need to be described here in more detail than what has been done previously, by their function.
- Such means provided in network equipment can in particular include means for choosing a compressed mode configuration from a set of reference configurations. Such means may also include in particular means for signaling to a mobile terminal compressed mode parameters corresponding to the selected compressed mode configuration. Such means may also include in particular means of transmission and / or reception in compressed mode, depending on the configuration of compressed mode chosen.
- Such means provided in a mobile terminal may include in particular means for receiving from network equipment a signaling relating to the compressed mode parameters corresponding to a selected compressed mode configuration. Such means may also include in particular means for receiving and / or transmitting in compressed mode, depending on the configuration of compressed mode chosen.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10182970.3A EP2262314A3 (fr) | 2002-03-29 | 2003-03-28 | Procédé de configuration de mode compressé dans un système de radiocommunications mobiles |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0204043 | 2002-03-29 | ||
FR0204043A FR2838019B1 (fr) | 2002-03-29 | 2002-03-29 | Procede de configuration de mode compresse dans un systeme de radiocommunications mobiles |
PCT/FR2003/000980 WO2003084256A2 (fr) | 2002-03-29 | 2003-03-28 | Procede de mesure pendant une procedure de transfert dans un systeme de communications mobiles |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1493296A2 true EP1493296A2 (fr) | 2005-01-05 |
Family
ID=27839362
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10182970.3A Withdrawn EP2262314A3 (fr) | 2002-03-29 | 2003-03-28 | Procédé de configuration de mode compressé dans un système de radiocommunications mobiles |
EP03730298A Withdrawn EP1493296A2 (fr) | 2002-03-29 | 2003-03-28 | Procede de mesure pendant une procedure de transfert dans un systeme de communications mobile |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10182970.3A Withdrawn EP2262314A3 (fr) | 2002-03-29 | 2003-03-28 | Procédé de configuration de mode compressé dans un système de radiocommunications mobiles |
Country Status (6)
Country | Link |
---|---|
US (1) | US7843879B2 (fr) |
EP (2) | EP2262314A3 (fr) |
JP (1) | JP4353810B2 (fr) |
CN (1) | CN1643964B (fr) |
FR (1) | FR2838019B1 (fr) |
WO (1) | WO2003084256A2 (fr) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4175510B2 (ja) * | 2003-08-29 | 2008-11-05 | ソニー・エリクソン・モバイルコミュニケーションズ株式会社 | 移動体端末、無線中継装置、移動通信システム |
US7702343B2 (en) * | 2005-04-04 | 2010-04-20 | Qualcomm Incorporated | Efficient gap allocation for cell measurements in asynchronous communication networks |
US7649869B2 (en) * | 2005-08-12 | 2010-01-19 | Qualcomm, Incorporated | Efficient cell measurements during transmission gaps in a compressed mode |
US7986661B2 (en) * | 2006-03-02 | 2011-07-26 | Qualcomm Incorporated | Efficient utilization of transmission gaps for cell measurements |
US8374108B2 (en) * | 2006-05-16 | 2013-02-12 | Sharp Kabushiki Kaisha | Mobile communication system, and mobile unit, base station unit and method therefore |
JP4927943B2 (ja) * | 2006-05-19 | 2012-05-09 | クゥアルコム・インコーポレイテッド | マスタ/スレーブ構成を有する無線中継器 |
US9036607B2 (en) | 2006-05-23 | 2015-05-19 | Sharp Kabushiki Kaisha | Method, mobile station device, base station device, and mobile communication system for gap-generation determination |
US20080085710A1 (en) * | 2006-10-05 | 2008-04-10 | Samsung Electronics Co., Ltd. | Gap scheduling method based on minimum gap patterns in long term evolution system |
GB2445779B (en) | 2007-01-11 | 2009-07-08 | Samsung Electronics Co Ltd | Wireless communication system |
US20090191883A1 (en) * | 2008-01-25 | 2009-07-30 | Infineon Technologies Ag | Method and device for transmitting data |
JP5015856B2 (ja) * | 2008-02-01 | 2012-08-29 | パナソニック株式会社 | 基地局、無線通信システム、およびハンドオーバ方法 |
US8639239B2 (en) | 2008-09-22 | 2014-01-28 | Sharp Kabushiki Kaisha | Base station apparatus, mobile station apparatus, mobile communication system and communication method having selectable inter-frequency measurement methods |
CN102356651B (zh) * | 2009-02-27 | 2014-01-22 | 华为技术有限公司 | 压缩模式参数的配置及测量方法、装置、系统 |
US8805371B2 (en) * | 2009-03-17 | 2014-08-12 | Airvana Lp | Identifying hand-over targets in lightly coordinated networks |
US8660605B2 (en) * | 2009-12-10 | 2014-02-25 | Altigen Communications, Inc. | Mobile communications device interface device and method |
US20150146551A1 (en) * | 2013-11-26 | 2015-05-28 | Qualcomm Incorporated | Inter radio access technology (irat) measurement using idle interval and dedicated channel measurement occasion |
US11974153B2 (en) | 2018-08-17 | 2024-04-30 | Nokia Technologies Oy | Measurement gap management for SSB and CSI-RS based RRM measurement |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW306102B (fr) * | 1993-06-14 | 1997-05-21 | Ericsson Telefon Ab L M | |
US6868075B1 (en) * | 1999-09-28 | 2005-03-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for compressed mode communications over a radio interface |
US6597679B1 (en) * | 1999-12-01 | 2003-07-22 | Telefonaktiebolat Lm Ericsson | Control of compressed mode transmission in WCDMA |
FI109862B (fi) * | 2000-01-10 | 2002-10-15 | Nokia Corp | Menetelmä taajuudenvälisen yhteydenvaihdon valmistelemiseksi, verkkoelementti ja matkaviestin |
EP1117269A1 (fr) * | 2000-01-13 | 2001-07-18 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Procédé et dispositifs pour procédures de commutation associée améliorées dans des systèmes de communication mobile |
FI112562B (fi) * | 2000-02-29 | 2003-12-15 | Nokia Corp | Mittausaukkojen määrittäminen keskinäistaajuksien mittauksessa |
FR2810177B1 (fr) * | 2000-06-13 | 2005-05-06 | Cit Alcatel | Procede pour le controle de puissance d'emission dans un systeme de radiocommunications mobiles |
US6785250B2 (en) * | 2001-07-09 | 2004-08-31 | Qualcomm Incorporated | Method and apparatus for time-sharing channelization code in a CDMA communication system |
US20030072279A1 (en) * | 2001-10-15 | 2003-04-17 | Nokia Corpration | Power control during compressed mode |
US6747958B2 (en) * | 2001-11-13 | 2004-06-08 | Qualcomm, Incorporated | Transport format combination selection for compressed mode in a W-CDMA system |
-
2002
- 2002-03-29 FR FR0204043A patent/FR2838019B1/fr not_active Expired - Lifetime
-
2003
- 2003-03-28 EP EP10182970.3A patent/EP2262314A3/fr not_active Withdrawn
- 2003-03-28 CN CN03806993.8A patent/CN1643964B/zh not_active Expired - Lifetime
- 2003-03-28 US US10/509,511 patent/US7843879B2/en active Active
- 2003-03-28 EP EP03730298A patent/EP1493296A2/fr not_active Withdrawn
- 2003-03-28 WO PCT/FR2003/000980 patent/WO2003084256A2/fr active Application Filing
- 2003-03-28 JP JP2003581521A patent/JP4353810B2/ja not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO03084256A3 * |
Also Published As
Publication number | Publication date |
---|---|
CN1643964A (zh) | 2005-07-20 |
FR2838019B1 (fr) | 2004-08-27 |
WO2003084256A3 (fr) | 2004-04-01 |
EP2262314A3 (fr) | 2013-11-13 |
JP4353810B2 (ja) | 2009-10-28 |
US20050286468A1 (en) | 2005-12-29 |
FR2838019A1 (fr) | 2003-10-03 |
CN1643964B (zh) | 2012-07-04 |
WO2003084256A2 (fr) | 2003-10-09 |
EP2262314A2 (fr) | 2010-12-15 |
JP2005522121A (ja) | 2005-07-21 |
US7843879B2 (en) | 2010-11-30 |
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