+

WO2002039775A1 - Commutation de voies dans un systeme universel de telecommunications mobiles (umts) - Google Patents

Commutation de voies dans un systeme universel de telecommunications mobiles (umts) Download PDF

Info

Publication number
WO2002039775A1
WO2002039775A1 PCT/EP2001/012412 EP0112412W WO0239775A1 WO 2002039775 A1 WO2002039775 A1 WO 2002039775A1 EP 0112412 W EP0112412 W EP 0112412W WO 0239775 A1 WO0239775 A1 WO 0239775A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
parameters
rnc
switching
dedicated
Prior art date
Application number
PCT/EP2001/012412
Other languages
English (en)
Inventor
Mikael Jan Are Winberg
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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 Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to AU2002223651A priority Critical patent/AU2002223651A1/en
Publication of WO2002039775A1 publication Critical patent/WO2002039775A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • 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
    • H04W88/12—Access point controller devices

Definitions

  • the present invention relates to data transmission in a Universal Mobile Telecommunications System (UMTS) and in particular, though not necessarily, to the allocation of transmission resources in a UMTS.
  • UMTS Universal Mobile Telecommunications System
  • FIG. 1 illustrates a simplified UMTS layer 2 protocol structure which is involved in the communication between mobile stations (e.g. mobile telephones) and Radio Network Controllers (RNCs) of a UMTS network.
  • RNCs Radio Network Controllers
  • BSCs Base Station Controllers
  • BTS Base Transceiver Stations
  • the layer 2 structure of Figure 1 consists of a set of Radio Access Bearers (RABs) which make available radio resources (and services) to user applications.
  • RABs Radio Access Bearers
  • RLC Radio Link Control
  • RLC Radio Link Control
  • RABs are mapped onto respective logical channels.
  • a Medium Access Control (MAC) entity receives data transmitted in the logical channels and further maps logical channels onto a set of transport channels. Transport channels are finally mapped to a single physical transport channel which has a total bandwidth ( ⁇ 2Mbits/sec) allocated to it by the network.
  • MAC Medium Access Control
  • a physical channel may be used exclusively by one mobile station (or UE), in which case it is referred to as a "dedicated channel” DCH.
  • a physical channel may be shared by a few users in which case the channel is referred to as a “dedicated shared channel” (DSCH).
  • DSCH dedicated shared channel
  • FACH/RACH common channel
  • a MAC entity scheduling the traffic for one UE is known as MAC-d, there being one MAC-d entity for each mobile station.
  • a dedicated physical channel used by a UE will thus be handled by the MAC-d entity.
  • a MAC entity connected to a common channel (FACH RACH or DSCH) is known as MAC-c/sh. There is one MAC-c/sh entity for each cell.
  • UMTS allows users of mobile stations to maintain a permanent connection to a UMTS Terrestrial Radio Access Network (UTRAN). However, there are nowhere near enough transport channels for each user to be permanently assigned a dedicated channel. UMTS will generally assign such "always connected" packet data users a best effort RAB, which can be switched between common and dedicated channels, this switching being controlled by the Radio Resource Control (RRC) layer in the RNC.
  • RRC Radio Resource Control
  • UE User Equipment
  • the RRC allocates a dedicated channel with high throughput, and performs a channel switch.
  • the decision in the RNC as to whether or not to perform a channel switch is based on traffic volume measurements, RLC buffer level measurements in the UE, and RLC buffer level measurements and data throughput measurements in the RNC. More particularly, the determination of whether or not channel switching between dedicated and common channels is to take place is performed using an algorithm which uses pre- configured values (possibly changeable by the operator) for parameters such as data level thresholds and timers, these parameters being the same for all UEs. Thus, even though each UE may be monitored separately to evaluate the need for channel switching, the same threshold and timer values will apply for all UEs, regardless of possible differences in traffic behaviour.
  • a UE may be used frequently to check a mailbox and download attachments, with short periods of inactivity in between. If the RNC controls the channel switching using the algorithm described above, the channel allocated to the UE will be switched from a common channel to a dedicated channel every time the user begins to access the mailbox as the traffic intensity increases rapidly, and will be switched back to a common channel once the first download is complete. However, there may be only a brief pause before further downloading takes place, in which case the UE will be switched back to a dedicated channel. Thus the channel will be switched very frequently. The user experiences a considerable variation in speed, and the signalling in the network is increased in the implementation of the channel switching procedures.
  • the inventor of the present invention has realised that, if the algorithm used by the RNC to decide when to switch UEs between dedicated and common channels uses the same parameters for all UEs, unsatisfactory allocation of channels occurs for some UEs.
  • RNC Radio Network Controller
  • the parameters used to determine whether or not to switch between allocated channels are dynamically modified in response to the previous passage of data into and out of the UE.
  • the initial transport channel is one of a dedicated channel, dedicated shared channel, and a common channel, and the step of switching between allocated channels involves changing to from one of these channels to another.
  • a method of allocating transmission resources to a UE at a RNC entity of a UMTS the UE being allocated the use of a dedicated transport channel or access to a common transport channel for data transfer, this allocation being switchable by the RNC, the method comprising using an adaptive channel switching algorithm to adjust parameters used to determine whether or not to perform a channel switch for the UE, the adjustment being based on previous data transfer behaviour of the UE.
  • Some although not necessarily all of the parameters used by the channel switching algorithm can thus be individually adapted in response to the behaviour of the UE.
  • the parameters comprise one or more of buffer level threshold values, data throughput level threshold values, and timer values.
  • the channel switching evaluation function in the RNC adjusts the parameters to be used individually for each UE, within a value range configured by a network operator.
  • Figure 1 illustrates schematically the layer 2 of a UMTS
  • Figure 2 is a flow diagram illustrating a method of allocating channels for use by individual mobile stations.
  • a simplified UMTS layer 2 consists of a Medium Access Control (MAC-d) entity for each mobile station, and a Radio Link Control (RLC) entity for each Radio Access Bearer (RAB).
  • the MAC-d entity performs scheduling of outgoing data packets, while the RLC entities provide buffers for respective input flows.
  • the RRC layer sets a limit on the maximum amount of data that can be transmitted from each flow by assigning a set of allowed Transport Format Combinations (TFC) to each MAC (referred to as a TFC Set or TFCS), but each MAC must independently decide how much data is transmitted from each flow by choosing the best available Transport Format Combination (TFC) from the TFCS.
  • TFC Transport Format Combinations
  • the physical transport channel is referred to as a dedicated channel if it is used by only one mobile station (or User Equipment (UE)).
  • UE User Equipment
  • a common channel is used by many UEs.
  • Clearly data can be transferred more quickly by a UE if it has the use of a dedicated channel rather than sharing a common channel with many other stations.
  • the RNC can switch the channel allocation of that UE: if the data transfer rate increases dramatically when the UE is currently allocated to a common channel, the UE may be switched to a dedicated channel. Conversely, if the data transfer rate decreases when the UE is allocated a dedicated channel, the UE may be switched to a common channel.
  • the RNC uses an algorithm - based on traffic volume measurements in the UE and in the RNC, timers, thresholds for RLC buffer levels, and data throughput levels - to determine whether to change the allocated channel.
  • the algorithm may be implemented in the RRC layer, or by a combination of the RRC and MAC layers (or possibly in some other layer/entity).
  • the RNC therefore uses an algorithm with dynamically adjustable parameters for the threshold and timer values.
  • the algorithm uses one set of parameters for each UE, and the parameters are adjusted by a second algorithm in response to the previous behaviour of a UE.
  • the parameters may be set at an initial setting defined by the operator for all UEs, the intention being that they will then be adjusted for individual UEs in response to behaviour patterns.
  • the operator may also set the range within which the parameters can vary.
  • a channel switching evaluation function in the RNC observes how often channel switching is requested and how much data is transmitted on common and dedicated channels by each UE using the initial setting of the threshold and timer values.
  • the adjustment could be designed to avoid frequent switching between dedicated and common channels during a session with variable data throughput.
  • the channel switching algorithm adapts after the first few channel switches, and lowers the throughput level threshold for downswitching to a common channel, so as to allow the UE to stay on the dedicated channel.
  • the algorithm returns to the initial setting and the UE is allocated a common channel.
  • FIG. 1 is a flow diagram further illustrating the method described above.
  • Figure 2A shows the method of allocating the channel for use by a single UE, in which the parameters used may be specific to that UE.
  • Figure 2B shows the action of the adaptive algorithm which will run in parallel with the method of Figure 2A, dynamically adapting the timers and thresholds in response to behaviour of the UE.
  • the RNC will need an additional monitoring facility to count how frequently the channel is switched for each UE.
  • Each UE has a "context data" store associated with it which is held in the RNC for as long as the UE is active and served by that RNC.
  • Information regarding the UE's previous behaviour - how much data is transferred and how often channel switching has occurred - can easily be added to this data store. This would then provide the information to the RNC to enable it to modify the parameters for the channel switching algorithm.
  • the improvement of the channel switching algorithm described above makes it easier for the operator to determine the initial channel switching threshold and timer values, as they will be dynamically adapted during use, so do not have to be precisely "fine tuned” so as to suit all UEs to begin with.
  • the avoidance of unnecessary channel switching gives a better service to the user, and reduces the signalling load on the network that is caused by channel switching.

Landscapes

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

Abstract

L'invention se rapporte à un procédé permettant d'attribuer des ressources de transmission au matériel d'un utilisateur (UE) dans une entité de contrôleur de réseau de radiocommunications (RNC) d'un système universel de télécommunications mobiles (UMTS). Ce procédé consiste à attribuer des canaux de transport (spécialisés ou communs) au matériel d'utilisateur (UE), et à faire commuter les canaux attribués, selon des paramètres qui sont spécifiquement attribués à ce matériel d'utilisateur (UE). Ces paramètres peuvent être modifiés de façon dynamique en réponse aux dernières entrées et sorties de données dans le/hors du matériel d'équipement (UE).
PCT/EP2001/012412 2000-11-07 2001-10-22 Commutation de voies dans un systeme universel de telecommunications mobiles (umts) WO2002039775A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002223651A AU2002223651A1 (en) 2000-11-07 2001-10-22 Channel switching in umts

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0027148A GB2369003A (en) 2000-11-07 2000-11-07 Channel switching in UMTS
GB0027148.6 2000-11-07

Publications (1)

Publication Number Publication Date
WO2002039775A1 true WO2002039775A1 (fr) 2002-05-16

Family

ID=9902688

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/012412 WO2002039775A1 (fr) 2000-11-07 2001-10-22 Commutation de voies dans un systeme universel de telecommunications mobiles (umts)

Country Status (4)

Country Link
AU (1) AU2002223651A1 (fr)
GB (1) GB2369003A (fr)
TW (1) TW520585B (fr)
WO (1) WO2002039775A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005013634A1 (fr) * 2003-07-28 2005-02-10 Hutchison Whampoa Three G Ip (Bahamas) Limited Commutation de voie commandee par temporisateur dans un systeme de communication umts
WO2005064977A1 (fr) * 2003-12-29 2005-07-14 Nokia Corporation Procede et systeme permettant de commander le support d'acces dans un service de donnees en temps reel
US7089005B2 (en) 2002-07-31 2006-08-08 Interdigital Technology Corporation Handover between a cellular system and a wireless local area network
WO2007011281A1 (fr) * 2005-07-15 2007-01-25 Teliasonera Ab Commutation adaptative d'un canal radio
CN1302672C (zh) * 2003-02-18 2007-02-28 华为技术有限公司 一种参数配置方法
WO2007039789A1 (fr) 2005-10-03 2007-04-12 Telefonaktiebolaget Lm Ericsson (Publ) Attribution de porteuse a debit optimise
US7539160B2 (en) 2003-12-29 2009-05-26 Nokia Corporation Method and system for controlling access bearer in a real-time data service
WO2010047630A1 (fr) * 2008-10-23 2010-04-29 Telefonaktiebolaget L M Ericsson (Publ) Système et procédé de communication
CN101175319B (zh) * 2006-11-02 2010-12-08 中兴通讯股份有限公司 一种无线网络控制器侧进行新旧配置切换的方法
US8699441B2 (en) 2011-10-06 2014-04-15 Telefonaktiebolaget L M Ericsson (Publ) Dynamic radio resource control state switching
US8948106B2 (en) 2011-10-06 2015-02-03 Telefonaktiebolaget Lm Ericsson (Publ) Controlling telecommunications channel switching

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0100475D0 (sv) 2001-02-09 2001-02-09 Ericsson Telefon Ab L M Method and system of retransmission
KR100747464B1 (ko) 2002-01-05 2007-08-09 엘지전자 주식회사 고속하향링크패킷접속（ｈｓｄｐａ）시스템을 위한타이머를 이용한 교착상황 회피방법
JP3512783B1 (ja) * 2002-10-08 2004-03-31 松下電器産業株式会社 通信端末装置及び基地局装置
DE60212973T2 (de) * 2002-10-24 2007-01-04 Lucent Technologies Inc. Verfahren und System zur Umleitung einer Anrufverbindung, die eine Basisstation und ein Mobilfunkgerät verbindet, zwischen zugeordneten und gemeinsamen Kanälen.
FR2852477B1 (fr) * 2003-03-12 2005-06-03 Bouygues Telecom Sa Procede d'allocation de ressources a un mobile
CN1988499B (zh) * 2005-12-19 2010-05-05 华为技术有限公司 一种信道分配的方法
FR2900787A1 (fr) * 2006-05-02 2007-11-09 France Telecom Gestion d'une mobilite decentralisee dans un reseau de telecommunications radio mobiles
FI120179B (fi) 2007-10-23 2009-07-15 Teliasonera Ab Optimoituja viestintäkuvioita
FI20080032A0 (fi) 2008-01-16 2008-01-16 Joikusoft Oy Ltd Älypuhelin WLAN-tukiasemana
FI20080345A0 (fi) 2008-05-09 2008-05-09 Joikusoft Oy Ltd Symbian S60 puhelin 3G kaistanyhdistäjänä
US9030940B2 (en) 2010-03-22 2015-05-12 Telefonaktiebolaget L M Ericsson (Publ) Apparatus and method in a telecommunications network
WO2011152773A1 (fr) * 2010-06-02 2011-12-08 Telefonaktiebolaget L M Ericsson (Publ) Procédé permettant de commander un changement de l'état de commande de ressources radio (rrc) d'un équipement utilisateur

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052307A1 (fr) * 1998-04-03 1999-10-14 Telefonaktiebolaget Lm Ericsson (Publ) Acces et allocation de ressources radio flexibles dans un systeme universel de telecommunications mobiles (sutm)
WO1999066748A1 (fr) * 1998-06-19 1999-12-23 Telefonaktiebolaget Lm Ericsson (Publ) Procede et dispositif d'adaptation dynamique d'un etat de connexion dans un systeme de communication mobile

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI110467B (fi) * 1997-08-19 2003-01-31 Nokia Corp Informaation siirto tietoliikennejärjestelmässä
FI106901B (fi) * 1999-02-23 2001-04-30 Nokia Mobile Phones Ltd Menetelmä ja järjestely pakettidatan siirron hallitsemiseksi solukkojärjestelmässä

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052307A1 (fr) * 1998-04-03 1999-10-14 Telefonaktiebolaget Lm Ericsson (Publ) Acces et allocation de ressources radio flexibles dans un systeme universel de telecommunications mobiles (sutm)
WO1999066748A1 (fr) * 1998-06-19 1999-12-23 Telefonaktiebolaget Lm Ericsson (Publ) Procede et dispositif d'adaptation dynamique d'un etat de connexion dans un systeme de communication mobile

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7089005B2 (en) 2002-07-31 2006-08-08 Interdigital Technology Corporation Handover between a cellular system and a wireless local area network
CN1302672C (zh) * 2003-02-18 2007-02-28 华为技术有限公司 一种参数配置方法
WO2005013634A1 (fr) * 2003-07-28 2005-02-10 Hutchison Whampoa Three G Ip (Bahamas) Limited Commutation de voie commandee par temporisateur dans un systeme de communication umts
WO2005064977A1 (fr) * 2003-12-29 2005-07-14 Nokia Corporation Procede et systeme permettant de commander le support d'acces dans un service de donnees en temps reel
US7539160B2 (en) 2003-12-29 2009-05-26 Nokia Corporation Method and system for controlling access bearer in a real-time data service
WO2007011281A1 (fr) * 2005-07-15 2007-01-25 Teliasonera Ab Commutation adaptative d'un canal radio
EP1932382A1 (fr) * 2005-10-03 2008-06-18 Telefonaktiebolaget L M Ericsson (Publ) Attribution de porteuse a debit optimise
WO2007039789A1 (fr) 2005-10-03 2007-04-12 Telefonaktiebolaget Lm Ericsson (Publ) Attribution de porteuse a debit optimise
EP1932382A4 (fr) * 2005-10-03 2011-11-16 Ericsson Telefon Ab L M Attribution de porteuse a debit optimise
CN101175319B (zh) * 2006-11-02 2010-12-08 中兴通讯股份有限公司 一种无线网络控制器侧进行新旧配置切换的方法
WO2010047630A1 (fr) * 2008-10-23 2010-04-29 Telefonaktiebolaget L M Ericsson (Publ) Système et procédé de communication
JP2012506663A (ja) * 2008-10-23 2012-03-15 テレフオンアクチーボラゲット エル エム エリクソン（パブル） 通信システム及び方法
US8699441B2 (en) 2011-10-06 2014-04-15 Telefonaktiebolaget L M Ericsson (Publ) Dynamic radio resource control state switching
US8948106B2 (en) 2011-10-06 2015-02-03 Telefonaktiebolaget Lm Ericsson (Publ) Controlling telecommunications channel switching

Also Published As

Publication number Publication date
TW520585B (en) 2003-02-11
GB0027148D0 (en) 2000-12-20
GB2369003A (en) 2002-05-15
AU2002223651A1 (en) 2002-05-21

Similar Documents

Publication Publication Date Title
WO2002039775A1 (fr) Commutation de voies dans un systeme universel de telecommunications mobiles (umts)
US7630338B2 (en) Techniques for radio link resource management in wireless networks carrying packet traffic
EP1336314B1 (fr) Services de vitesse de transmission variable dans un reseau d'acces radio
EP1243146B1 (fr) Commutation selon le type de canal entre un canal commun et un canal dedie, sur la base de la charge du canal commun
EP1236371B1 (fr) Commande de commutation du type de canal
US7099622B2 (en) Controlling channel switching in a UMTS network
CA2420953C (fr) Procede et systeme ameliores pour transferer des informations dans un service de donnees radio en mode paquets
KR101001961B1 (ko) 타임 슬롯형 통신 시스템에서 무선 자원을 관리하는 방법및 시스템
EP0981229B1 (fr) Commande de porteuses radio dynamiques et asymétriques dans un système mobile de communication de données par paquet
US20030012217A1 (en) Channel-type switching to a common channel based on common channel load
EP1510024A2 (fr) Connections commutation de paquets utilisant des voies sp cialis es
JP4685885B2 (ja) 判定された送信要件に動的に基づくチャンネル帯域幅およびデータ誤り目標値の選択
CA2404523C (fr) Transmission de donnees en paquets
EP2437445B1 (fr) Contrôle dynamique de rendement d'interface radio
EP2375658B1 (fr) Congestion de trafic dans des contrôleurs de réseau radio
RU2392755C2 (ru) Способ выделения ресурсов, система связи, сетевой элемент, модуль и дистрибутивный носитель компьютерной программы
US20030096619A1 (en) Data transmission in a telecommunications network
WO2007135236A1 (fr) Gestion de profils de qualité de service dans un système de télécommunication mobile
CN101273555A (zh) 移动电信中的改进方案
Yerima et al. An enhanced buffer management scheme for multimedia traffic in HSDPA
KR100838472B1 (ko) 이동통신 시스템 및 그의 호처리 방법
KR20050064906A (ko) 고속 하향 패킷 접속을 지원하는 이동 통신 시스템에서패킷 스케줄링을 위한 베어러 설정 방법

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PH PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载