WO2007147313A1 - Procédé et dispositif de contrôle d'admission d'appel d'un système de communication - Google Patents

Procédé et dispositif de contrôle d'admission d'appel d'un système de communication Download PDF

Info

Publication number
WO2007147313A1
WO2007147313A1 PCT/CN2007/001284 CN2007001284W WO2007147313A1 WO 2007147313 A1 WO2007147313 A1 WO 2007147313A1 CN 2007001284 W CN2007001284 W CN 2007001284W WO 2007147313 A1 WO2007147313 A1 WO 2007147313A1
Authority
WO
WIPO (PCT)
Prior art keywords
service
bandwidth
interface
access
activation factor
Prior art date
Application number
PCT/CN2007/001284
Other languages
English (en)
Chinese (zh)
Inventor
Shenghong Xu
Wenyuan Yong
Long Li
Xiangjun Zhang
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007147313A1 publication Critical patent/WO2007147313A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/83—Admission control; Resource allocation based on usage prediction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/15—Flow control; Congestion control in relation to multipoint traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation

Definitions

  • the present invention relates to communication technologies, and more particularly to call admission control methods and apparatus in communication systems. Background technique
  • the Universal Terrestril Radio Access Network (UTRAN) of the Wideband Code Division Multiple Address (WCDMA) system is composed of a plurality of Radio Network Subsystems (RSS), and each RNS includes one Radio Network Controller (RNC, Radio Network Controller) and one or more Node Bs (Node B).
  • RNC Radio Network Controller
  • Node B Node B
  • the Node B and the RNC are connected through the Iub interface, and the RNC and the RNC are connected through the Iur interface, and the Node B communicates with the user equipment (UE, User Equipment) through the air interface.
  • UE User Equipment
  • the transmission bandwidth consumed by the Iub interface traffic generally cannot exceed the maximum available transmission bandwidth resources and does not exceed the pre-configured AAL2 channel maximum. Available transmission bandwidth.
  • the maximum transmission bandwidth resource and the maximum transmission bandwidth in the following are the smaller values of the former two.
  • the Iub interface generally uses ATM Adaptation Layer 2 (AAL2) for wireless signal transmission, and the Iub interface transmission bandwidth refers to AAL2 bandwidth.
  • AAL2 ATM Adaptation Layer 2
  • FIG. 1 is a flow chart showing call admission control in a prior art WCDMA system.
  • the control process is specifically as follows: First, in step 100, the user sends a service request to the WCDMA system to request access to the WCDMA system to perform its service; in step 101, after receiving the request, the system calculates the service requested by the access user. The AAL2 bandwidth of the Iub interface will be occupied, and then in step 102, it is calculated whether the AAL2 bandwidth occupied after accessing the user service exceeds the maximum transmission bandwidth of the Iub interface.
  • step 103 is executed to prohibit access to the service of the user; Then, when the result of the judgment is that the AAL2 bandwidth occupied by the user service does not exceed the maximum transmission bandwidth of the Iub interface, step 104 is executed to allow access to the user service.
  • the starting point of the prior art is to ensure that the Iub transmission bandwidth is not congested, that is, the maximum bandwidth occupied by the user of the Iub interface does not exceed the maximum transmission bandwidth of the Iub interface under any circumstances. Therefore, each service uses the full rate as the admission control basis, that is, in the process of calculating the AAL2 bandwidth occupied after the service access, it is considered that all services currently accessed occupy the bandwidth at the full rate.
  • the physical layer transmitted by the Iub interface is configured with only one E1 standard (a data transmission standard of a trunk line, usually at a rate of 2.048 Mbps).
  • E1 standard a data transmission standard of a trunk line, usually at a rate of 2.048 Mbps.
  • the maximum bandwidth of the AAL2 channel is 1760 k, and the system only has two A service, an adaptive multi-rate (AMR) voice service with a bandwidth of 12.2 kbps and a packet domain (PS, Packet Switched) service with a bandwidth of 384 kbps.
  • AMR adaptive multi-rate
  • PS Packet Switched
  • Total AAL2 bandwidth consumption Mx full rate AAL2 bandwidth occupied by PS services +Nx full rate AAL2 bandwidth occupied by AMR voice service (1)
  • M is the number of full-rate PS 384 kbps services accessed, and N is the number of 12.2 kbps of full-rate AMR voice services.
  • the AAL2 bandwidth occupied by the service can be calculated according to the format of the FP/AAL2 protocol and the actual bandwidth of the service. For example, a service full-rate 384 kbps PS 384 kbps service will occupy an AAL2 bandwidth of 553 kbps at full rate, while a service full-rate bandwidth of 12.2 kbps AMR voice service will occupy 23.4 kbps of AAL2 bandwidth at full rate. Therefore, in the calculation of the total AAL2 bandwidth usage, the AAL2 bandwidth occupied by each service at full rate is used. Since the AAL2 channel bandwidth is up to 1760k, the total AAL2 bandwidth consumption must be less than 1760k.
  • the number of AMR voice services is N, and assuming that a user requests access to a new AMR voice service, the system calculates M full-rate 384k services and (N+1) full-rate AMR voice services according to formula (1).
  • the AAL2 bandwidth is used as the total AAL2 bandwidth consumption, and it is judged whether the value is greater than the AAL2 channel bandwidth maximum of 1760k. If the result of the judgment indicates that the AAL2 bandwidth occupied by the access to the user service exceeds the maximum AAL2 channel bandwidth of 1760k, the access to the user's AMR voice service is prohibited. Otherwise, when the judgment result indicates that the user service is accessed.
  • the occupied AAL2 bandwidth does not exceed the maximum AAL2 channel bandwidth of 1760k, allowing access to the user service. This ensures that the total AAL2 bandwidth consumption does not exceed the maximum available transmission bandwidth resources, so that transmission bandwidth congestion does not occur.
  • the actual occupied bandwidth of each service such as AMR voice, circuit domain (CS, Circuit Switched) data service, PS data service, etc.
  • AMR voice AMR voice
  • CS Circuit Switched
  • PS data service PS data service
  • the activation factor reflects the probability of the full rate data transmission of the service, and the probability is generally less than one. Therefore, the total bandwidth occupied by the bandwidth occupied by various services is used as the standard for admission control. Although the Iub transmission bandwidth is not congested, the transmission bandwidth resources are greatly wasted.
  • the embodiment of the invention provides a call admission control method and device in a communication system to improve the utilization rate of the Iub interface transmission bandwidth resource.
  • the interface call admission control method in the communication system includes the following steps: after receiving the service request from the user, the communication system calculates, according to the activation factor corresponding to the service requested to be accessed, after accessing the service Interface bandwidth that will be occupied;
  • the call admission control apparatus in the communication system provided by the embodiment of the present invention includes: an access control unit, configured to prohibit or allow access to a service requested by an access user, and further includes:
  • An activation factor setting unit configured to set and store an activation factor corresponding to each service
  • a bandwidth calculation unit configured to calculate, according to an activation factor corresponding to the service that the request is accessed, an interface bandwidth that will be occupied after accessing the service, and in the calculating, after the system receives the service request of the user
  • the access control unit is notified to prohibit access to the service; and when the calculated interface bandwidth does not exceed the maximum transmission bandwidth of the interface, notify the The access control unit allows access to the service.
  • Embodiments of the present invention utilize an activation factor by setting different activation factors for different services respectively. To calculate the control bandwidth of the lub interface admission, the utilization efficiency of the interface transmission bandwidth can be improved, and the network operation cost can be saved.
  • 1 is a flow chart of a call admission control process in an existing WCDMA system.
  • FIG. 2 is a flow chart of a call admission control process in a WCDMA system according to an embodiment of the present invention
  • FIG. 3 is a schematic block diagram of a first embodiment of a call admission control apparatus in a WCDMA system according to the present invention
  • a schematic block diagram of a second embodiment of the control device is Detailed ways.
  • the embodiments of the present invention are not limited to the WCDMA network system, and are applicable to other network systems, such as a TD-SCDMA (Time-Division Synchronization Code Division-Multiple-Access) network system, but The embodiment of the present invention will be described more conveniently and clearly.
  • TD-SCDMA Time-Division Synchronization Code Division-Multiple-Access
  • the embodiment of the present invention sets different activation factors for different services (for example, AMR service, PS 384k, etc.), that is, the probability of reaching the full rate bandwidth occupation. , to calculate the control bandwidth as a lub interface admission standard.
  • step 200 the user sends a service request to the WCDMA system to request access to the WCDMA system to perform its service; in step 201, after receiving the request, the system calculates according to the activation factor corresponding to the service requested to access the service. After accessing the service requested by the user, the AAL2 bandwidth of the lub interface will be occupied, and then it is determined in step 202 whether the AAL2 bandwidth occupied after accessing the user service exceeds the maximum transmission bandwidth of the lub interface.
  • step 203 is executed to prohibit access to the service of the user; otherwise, when the judgment result is that the user service is accessed. If the occupied AAL2 bandwidth does not exceed the maximum transmission bandwidth of the lub interface, step 204 is performed to allow access to the user service.
  • the maximum transmission bandwidth of the above lub interface refers to the maximum bandwidth available for the lub interface transmission, which is determined by the data of the transmission link and the AAL2 channel configuration bandwidth actually configured by the lub interface.
  • the AAL2 channel is configured with a bandwidth of 3600 kbps, it is smaller than the maximum available transmission bandwidth.
  • j Iub interface to a maximum bandwidth, i.e., whichever is lower in 3968kbps and 3600kbps, that is 3600kbps 0
  • the method embodiment of the present invention sets an activation factor for each service, indicating the probability that the service reaches the full rate during the transmission process, and the corresponding service of each service.
  • the activation factor can be dynamically set by the operator. The principle of setting is that the Iub interface transmission bandwidth blocking probability is acceptable to the operator. It is also assumed that during the transmission, each service occupies a bandwidth of its full rate AAL2 bandwidth and the corresponding activation factor. It can be seen that the method embodiment of the present invention sets different activation factors for different services, and makes the activation factor less than 1, as the Iub interface admission control bandwidth, thereby saving the Iub interface transmission bandwidth, that is, equivalent to the same Iub interface transmission. Bandwidth can allow access to more users.
  • the call admission control method is further described by taking the two types of services, that is, the AMR voice service and the PS 384k service, as an example.
  • the AAM2 activation factor of the AMR voice service is p, that is, the bandwidth actually occupied by each AMR voice service in the actual transmission process is the full rate bandwidth (AMRAlloc BW) 23.4kbp S xp; the PS 384 kbps service activation factor is q, that is, the actual transmission
  • the actual bandwidth occupied by each PS 384 kbps service in the process is 533 kbps (PS data Alloc BW ) xq.
  • the two parameters p and q are between 0 and 1.
  • Total AAL2 bandwidth consumption Mx full rate AAL2 bandwidth occupied by PS 384 kbps service xq+Nx Full rate AAL2 bandwidth occupied by AMR voice service xp ( 2 )
  • the parameters p, q can be determined according to the actual operation of the network. For example, multiple PS 384 kbps The probability of simultaneous full rate transmission of the service is small, r can be taken as 0.5, the probability of AMR voice full rate transmission is medium, p can take a smaller value, such as 0.7, and so on.
  • the call admission control method of the embodiment of the present invention if the number of PS data services of the AAL2 bandwidth currently using the lub interface is M, the number of AMR voice services is N. Assuming that a user requests access to a new AMR voice service, the system calculates the AAL2 bandwidth occupied by the M PS data service and the (N+1) AMR voice service as the total AAL2 bandwidth consumption according to the formula (2), and then determines the value. Whether it is greater than the AAL2 channel bandwidth maximum is 1760 kbps.
  • the access to the user's AMR voice service is prohibited. Otherwise, when the judgment result indicates that the user service is accessed.
  • the occupied AAL2 bandwidth does not exceed the maximum AAL2 channel bandwidth of 1760 kbps, and access to the user service is allowed.
  • the operator After the operator determines an initial parameter p and q, it needs to monitor the actual blocking probability of the transmission bandwidth of the network lub interface. If the probability of blocking occurs is large, the values of the parameters p and q need to be modified in time to save the lub transmission bandwidth and block. Control is at a lower level.
  • the initial value of the preset activation factor is IntialActiveFactor , the maximum activation factor is MaxActiveFactor, the minimum activation factor is MinActiveFactor, and the activation factor adjustment step is ActiveFactoi'Step.
  • the activation factor can be dynamically adjusted based on the bandwidth blocking of the lub interface transmission. The general principle is that if an obstruction occurs, the value of the activation factor is raised; if not, the value of the activation factor is lowered. However, the activation factor adjustment range does not exceed MaxActiveFactor, not less than MinActiveFactor.
  • Each activation factor adjustment unit can be a step size defined by ActiveFactorStep.
  • the Buffer occupancy rate on the R-side lub interface can basically reflect the congestion degree of the ⁇ interface.
  • the default lub interface sends the Buffer occupancy threshold, that is, the blocking threshold ConvergeThr, and the blocking hysteresis Hyst.
  • the method of the embodiment of the present invention compares the call admission control with the prior art, and further illustrates the improvement of the transmission bandwidth utilization rate of the Iub interface by using the technical solution provided by the embodiment of the present invention.
  • the AAL2 channel bandwidth maximum of 1760 kbps allows up to three 384 kbps PS 384 kbps services and four 12.2 kbps AMR voice services, or three. 384 kbps PS 384 kbps service and 4 12.2 kbps AMR voice services.
  • the transmission bandwidth of the Iub interface can be saved, that is, the same Iub transmission bandwidth can be allowed to access more users, and the blocked Iub interface is still within an acceptable range of an operator.
  • the call admission control method of the embodiment of the present invention is described by taking the case that the system only allows access to the PS 384 kbps data service and the AMR voice service. It should be understood that, for the case where multiple services exist in the system at the same time, the idea of the embodiment of the present invention can be similarly applied, and different activation factors are set according to the probability of occupying bandwidth of different services at full rate, and the bandwidth of the Iub interface admission control is calculated. .
  • Embodiments of the present invention also provide a call admission control apparatus in a communication system to improve utilization of a transmission bandwidth of an interface in a communication system.
  • FIG. 3 is a schematic block diagram of a first embodiment of a call admission control apparatus in a WCDMA system according to the present invention:
  • the apparatus of the present invention comprises: an access control unit 30, an activation factor setting unit 31 and bandwidth calculation unit 32.
  • the access control unit 30 is configured to prohibit or allow the access user to request the bandwidth calculation unit 32 to calculate, according to the activation factor corresponding to the service requested by the user, after the system receives the service request of the user.
  • the interface bandwidth that will be occupied after the service is entered, and when the calculated interface bandwidth exceeds the maximum transmission bandwidth of the interface, the access control unit 30 is notified to prohibit access to the service; When the interface bandwidth does not exceed the maximum transmission bandwidth of the interface, the access control unit 30 is notified to allow access to the service.
  • the activation factor setting unit 31 may set the same or different activation factors for different services when setting activation factors corresponding to various services, and the activation factor is a value greater than 0 and less than 1.
  • the bandwidth calculation unit 32 calculates the interface bandwidth that will be occupied after the access to the service according to the activation factor. For reference, refer to the description in the foregoing method embodiment of the present invention, and details are not described herein.
  • FIG. 4 is a schematic diagram of a second embodiment of a call admission control apparatus in a WCDMA system according to the present invention:
  • a blocking probability calculating unit 33 and an activation factor adjusting unit 34 are further provided.
  • the blocking probability calculation unit 33 is configured to calculate an interface transmission bandwidth blocking probability.
  • the activation factor adjusting unit 34 is configured to adjust the activation factor stored in the activation factor setting unit 31 in real time according to the interface transmission bandwidth blocking probability.
  • the activation factor adjustment unit 34 adjusts the preset activation factor in real time according to the interface transmission bandwidth blocking probability, which can better ensure the performance of the system in the case of sudden traffic.
  • a threshold setting unit 35 and a comparison unit 36 may be further provided in this embodiment.
  • the alarm value setting unit 35 is configured to set a threshold for the interface transmission bandwidth blocking probability
  • the comparison unit 36 is configured to compare the interface transmission bandwidth blocking probability and the interface calculated by the blocking probability calculation unit 33. The interpretation of the transmission bandwidth blocking probability is transmitted, and the comparison result is notified to the activation factor adjusting unit 34.
  • the activation factor adjusting unit 34 reduces the activation factor corresponding to each service; W 200
  • the specific adjustment range may be a fixed value, or may be determined each time according to the calculated difference between the interface transmission bandwidth blocking probability and the threshold of the set interface transmission bandwidth blocking probability.
  • the device of the invention can be applied to a WCDMA system and integrated on the RNC to control the call of the user to the Iub interface, save the transmission bandwidth of the Iub interface, and increase the number of users allowed to access the same Iub transmission bandwidth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé de contrôle d'admission d'appel d'un système de communication qui se compose des étapes suivantes : après avoir reçu une demande de service d'un utilisateur, le système de communication calcule la largeur de bande d'interface qui sera occupée une fois qu'on accède audit service, en se basant sur les facteurs actifs qui correspondent aux services qui demandent l'accès ; et alors que ladite largeur de bande obtenue par le calcul est supérieure à la largeur de bande de ladite interface, il rejette l'accès au service dudit utilisateur. Un dispositif de contrôle d'admission d'appel d'un système de communication comprend : Une unité de contrôle d'accès, une unité de définition de facteur actif et une unité de calcul de largeur de bande. La présente invention, grâce à la définition respective des facteurs actifs pour les divers services, qui calcule la largeur de bande de contrôle d'admission d'appel pour les facteurs actifs, peut augmenter l'efficacité d'utilisation de la largeur de bande transmettant l'interface et économiser les frais d'exploitation du réseau.
PCT/CN2007/001284 2006-06-16 2007-04-19 Procédé et dispositif de contrôle d'admission d'appel d'un système de communication WO2007147313A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200610092288.5 2006-06-16
CNB2006100922885A CN100502585C (zh) 2006-06-16 2006-06-16 通信系统中的接口呼叫准入控制方法

Publications (1)

Publication Number Publication Date
WO2007147313A1 true WO2007147313A1 (fr) 2007-12-27

Family

ID=38076999

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2007/001284 WO2007147313A1 (fr) 2006-06-16 2007-04-19 Procédé et dispositif de contrôle d'admission d'appel d'un système de communication

Country Status (2)

Country Link
CN (1) CN100502585C (fr)
WO (1) WO2007147313A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101494877B (zh) 2008-01-23 2012-08-22 华为技术有限公司 无线通信系统中准入控制的方法和装置
CN102076015A (zh) * 2010-11-16 2011-05-25 上海华为技术有限公司 一种控制语音激活因子的方法及装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6169738B1 (en) * 1997-11-06 2001-01-02 Lucent Technologies Inc. Method for call admission in packet voice system using statistical multiplexing and dynamic voice encoding
US20050050246A1 (en) * 2003-09-01 2005-03-03 Nokia Corporation Method of admission control
CN1623345A (zh) * 2002-03-13 2005-06-01 艾利森电话股份有限公司 面向分组、多业务网络中的连接许可控制

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6169738B1 (en) * 1997-11-06 2001-01-02 Lucent Technologies Inc. Method for call admission in packet voice system using statistical multiplexing and dynamic voice encoding
CN1623345A (zh) * 2002-03-13 2005-06-01 艾利森电话股份有限公司 面向分组、多业务网络中的连接许可控制
US20050050246A1 (en) * 2003-09-01 2005-03-03 Nokia Corporation Method of admission control

Also Published As

Publication number Publication date
CN100502585C (zh) 2009-06-17
CN1968522A (zh) 2007-05-23

Similar Documents

Publication Publication Date Title
JP3850664B2 (ja) 受け入れ制御方法
EP1142154B1 (fr) Procede de commande d'une charge de trafic dans un reseau de telecommunications
JP4450832B2 (ja) 時分割型通信システムにおける無線リソースを管理する方法およびシステム
JP5329573B2 (ja) リバースアクティビティビットの評価とデータフローに特定の上方／下方ランピング関数にもとづく送信電力制御のための方法および対応する無線アクセス端末
JP4728252B2 (ja) 電力に基づく無線通信チャネルの適応的レート制御
JP4234977B2 (ja) デジタル移動ネットワークを介して通信するための通信デバイスおよび方法
JP3459635B2 (ja) セルラーシステムにおいてパケットデータ転送を管理する方法及び装置
CA2790338C (fr) Attribution de ressources autonome et programmee cooperative pour un systeme de communication distribue
EP1774804B1 (fr) Procede de controle des communications entre deux noeuds d'un systeme de communication
EP1213894A1 (fr) Procédé d'ordonnancement d'une qualité de service dans un système de communication a haut débit
EP1213869A1 (fr) Algorithme dynamique pour limiter la vitesse de liaison de retour dans un système à debit binaire élévé
WO2006095224A1 (fr) Ponderation de puissance de sortie
EP1331768A1 (fr) Systeme de commande de vitesse, et la méthode, pour un liaison dans un système de communications sans fil
EP2103050A1 (fr) Contrôle de volume de trafic dans un réseau de télécommunications
JP2007524330A (ja) 無線通信システムにおける動的なバックホールリソースの管理の方法及び装置
WO2014000186A1 (fr) Procédé et dispositif de contrôle d'accès
JP5410296B2 (ja) 高速ダウンリンク・パケット・アクセスに有用な電力過負荷制御方法
WO2013078589A1 (fr) Procédé et dispositif de détermination de paramètre de décalage de puissance
US7574229B2 (en) Output power control in multislot uplinks
US7113478B2 (en) Radio telecommunications system with improved use of air interface (II)
WO2007147313A1 (fr) Procédé et dispositif de contrôle d'admission d'appel d'un système de communication
JP2003533928A (ja) 通信チャネルの伝送速度変更のための方法および装置
WO2012019519A1 (fr) Procédé, appareil et système permettant l'ajustement d'une puissance de transmission et une indication correspondante
WO2007033528A1 (fr) Procede pour changer de canal dans un systeme d’acces de paquets haut debit
CN112235833A (zh) 数据流参数动态配置方法、会话管理功能实体

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07720857

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07720857

Country of ref document: EP

Kind code of ref document: A1