WO2004080086A2 - Transmission en mode autonome a partir d'une station mobile - Google Patents

Transmission en mode autonome a partir d'une station mobile Download PDF

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Publication number
WO2004080086A2
WO2004080086A2 PCT/IB2004/001004 IB2004001004W WO2004080086A2 WO 2004080086 A2 WO2004080086 A2 WO 2004080086A2 IB 2004001004 W IB2004001004 W IB 2004001004W WO 2004080086 A2 WO2004080086 A2 WO 2004080086A2
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WO
WIPO (PCT)
Prior art keywords
mobile station
communicating
data
enabled
flag
Prior art date
Application number
PCT/IB2004/001004
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English (en)
Other versions
WO2004080086A3 (fr
Inventor
Mo-Han Fong
Jun Li
Sophie Vrzic
Ali Iraqi
Original Assignee
Nortel Networks Limited
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 Nortel Networks Limited filed Critical Nortel Networks Limited
Publication of WO2004080086A2 publication Critical patent/WO2004080086A2/fr
Publication of WO2004080086A3 publication Critical patent/WO2004080086A3/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • 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]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/22—Negotiating communication rate

Definitions

  • the invention relates generally to autonomous mode data transmission from a mobile station. -,
  • a mobile communications network is typically made up of a plurality of cells.
  • Each cell includes a radio base station, with each base station connected to a mobile switching center or a packet service node that manages communications sessions between mobile stations and terminals coupled to a public switched telephone network (PSTN) or a packet- based data network. Communications between mobile stations and base stations are performed over wireless links.
  • PSTN public switched telephone network
  • TDMA time-division multiple access
  • CDMA code-division multiple access
  • a packet-switched wireless technology is defined by the CDMA 2000 family of standards, developed by the Third Generation Partnership Project 2 (3GPP2).
  • 3GPP2 Third Generation Partnership Project 2
  • a CDMA 2000 wireless communications network is capable of supporting both circuit- switched services and packet-switched services.
  • packet-switched wireless communications protocols have also been developed, such as the Enhanced General Packet Radio Service (EGPRS) protocol as defined by the 3GPP (Third Generation Partnership Project) UMTS (Universal Mobile Telecommunications System) Release 1999 Standard, and others.
  • EGPP Enhanced General Packet Radio Service
  • the base station typically has to first schedule a traffic channel for the mobile station to send the desired data.
  • packet data is carried in a reverse supplemental channel (R-SCH).
  • R-SCH reverse supplemental channel
  • a base station schedules an R-SCH for a mobile station to transmit packet data over the reverse wireless link.
  • signaling request and grant signaling
  • the amount.of time it takes for the mobile station and base station to exchange request and grant signaling adds to the overall delay in the transmission of packet data.
  • the exchange of request and grant signaling also consumes valuable bandwidth in the air interface between mobile station and base station.
  • a method of communicating data in a wireless communications network includes communicating, between a mobile station and a base station, an indicator of an autonomous rate supportable over a reverse wireless link between the mobile station and base station.
  • a flag indicating whether autonomous mode is enabled for the mobile station is communicated between the mobile station and the base station.
  • data is communicated over the reverse wireless link at a data rate less than or equal to the autonomous rate without the base station having to first schedule the mobile station.
  • Fig. 1 is a block diagram of an example arrangement of a mobile or wireless communications network that incorporates an embodiment the invention.
  • Fig. 2 is a message flow diagram of a procedure for enabling autonomous communication of data from the mobile station to the base station at a rate up to an maximum autonomous data rate, in accordance with an embodiment of the invention.
  • Fig. 3 is a timing diagram to illustrate timing relationships between reverse request channel (R-REQCH) messages and frames transmitted on a reverse packet data channel (R- PDCH), in accordance with an embodiment.
  • R-REQCH reverse request channel
  • R-PDCH reverse packet data channel
  • a wireless or mobile communications network includes components that operate according to CDMA (code-divisional multiple access) 2000.
  • CDMA 2000 is defined by the CDMA 2000 family of standards (including the TIA-2000 standards, TIA-2001 standards, and the TIA-2000-D standards).
  • other types of wireless protocols can be used for communications in the wireless communications network, including other versions of CDMA, TDMA protocols, UMTS (Universal Mobile Telecommunications System) protocols, and other protocols.
  • the wireless communications network includes multiple cells 18, each including a base transceiver subsystem (BTS) 20 for performing radio telecommunications with mobile stations within the coverage area of the cell 18.
  • the BTS entities 20 are connected to one or more base station controllers (BSCs) 22.
  • BSCs base station controllers
  • a BTS 20 and BSC 22 are referred to as a "base station" 19. More generally, a “base station” refers to any entity (or collection of entities) that communicates wirelessly with mobile stations and that exchanges control signaling with the mobile stations for establishing, terminating, or otherwise managing communication sessions (e.g., circuit-switched call sessions, packet-switched voice call sessions, other packet-switched communications sessions, and so forth).
  • the base station 19 is coupled to a mobile switching center (MSC) 24, which is responsible for switching mobile station- originated or mobile station-terminated circuit-switched traffic.
  • MSC mobile switching center
  • the MSC 24 is the interface for signaling and user traffic between the wireless network and other public switched networks (such as a public switched telephone network (PSTN) 26) or other MSCs.
  • PSTN 26 is connected to landline terminals, such as telephones 28.
  • voice traffic is routed through the air interface between the mobile station 16 and a base station 14, and through the base station 14, MSC 24, and PSTN 26.
  • the wireless communications network 10 also supports packet data services, in which packet data is communicated between a mobile station and another endpoint, which can be a terminal coupled to a packet data network 34 or another mobile station that is capable of communicating packet data.
  • packet data network 34 include private networks (such as local area networks or wide area networks) and public networks (such as the Internet). Packet data is communicated in a packet-switched communications session established between the mobile station and the other endpoint.
  • the base station 19 is coupled to a packet control function (PCF) module 32, which manages the relay of packets between the BSC 22 and a packet data serving node (PDSN) 30.
  • PCF packet control function
  • the BSC 22 and PCF module 32 can be implemented on one platform or on multiple platforms.
  • a “platform” generally refers to an assembly of hardware and software that provides predefined tasks.
  • the PDSN 30 establishes, maintains, and terminates link layer sessions to mobile stations, and routes mobile station-originated or mobile station-terminated packet data traffic.
  • the PDSN 30 is coupled to the packet data network 34, which is connected to various endpoints, such as a computer 36 or a network telephone 38 (which is a telephone that is fitted with a network interface card for communications over packet data networks).
  • packet-switched communications include web browsing, electronic mail, text chat sessions, file transfers, interactive game sessions, voice-over-IP (Internet Protocol) sessions, and so forth.
  • the wireless communications network thus provides two different types of communications: circuit-switched communications and packet-switched communications.
  • Circuit-switched communications are routed through the MSC 24, while packet-switched communications are routed through the PDSN 30.
  • circuit-switched communications a dedicated end-to-end channel is established for the duration of a call session.
  • packet-switched communications utilize a connectionless intranetwork layer, such as that defined by the Internet Protocol (IP).
  • IP Internet Protocol
  • packets or other units of data carry routing information (in the form of network addresses) that are used to route the packets or data units over one or more paths to a destination endpoint.
  • IPv4 One version of IP, referred to as IPv4, is described in Request for Comments (RFC)
  • IPv6 Internet Protocol, Version 6 (IPv6) Specification
  • the base station 19 includes a scheduler 40 to schedule (in scheduled mode) transmission of data by the mobile station 16 over the respective reverse wireless links.
  • the scheduler 40 can be implemented in either the BTS 20 or the BSC 22, or both.
  • the scheduler 40 specifies a data rate, a start time, and duration through either layer 2 signaling or layer 3 signaling messages. If scheduled, a mobile station 16 is able to transmit data, including packet data, according to the specifications provided by the scheduler 40. This type of transmission by mobile stations is referred to as scheduled mode transmission.
  • the communication of data over the reverse wireless link can be performed according to an autonomous mode.
  • the types of data transmissions that can benefit from autonomous mode transmission include data traffic that is delay-sensitive and stream -like (rather than bursty).
  • data traffic that is delay-sensitive and stream -like (rather than bursty).
  • interactive gaming sessions over a packet data network involve streaming data that is delay-sensitive.
  • Other types of data transmissions that can benefit from autonomous mode transmission include low-rate si naling traffic. Note, however, that autonomous mode transmission over a reverse wireless link is not to be limited to only the traffic mentioned above, but rather can be applied to any type of traffic.
  • a mobile station 16 containing data to transmit does not have to wait for the scheduler 40 in the base station 19 to schedule a channel for the mobile station 16. Instead, the mobile station 16 is able to autonomously send data over the reverse wireless link at a data rate that is less than or equal to a specified maximum autonomous data rate. Effectively, in autonomous mode, the mobile station 16 is able to transmit packet data at a data rate up to the maximum autonomous data rate without an explicit, scheduled rate assignment received in either layer 2 signaling or layer 3 signaling messages from the scheduler 40 in the base station 19.
  • the maximum autonomous data rate is specified by an indicator (in the form of a parameter) sent by the base station 19 to the mobile station 16.
  • the parameter is named REV_PDCH_MAX_AUTO_TPRs, which refers to the maximum autonomous traffic-to-pilot ratio (TPR) on a reverse packet data channel (R- PDCH).
  • R-PDCH is used for transmitting packet data from the mobile station over the reverse wireless link.
  • the traffic-to-pilot ratio is used by the mobile station to calculate a corresponding data rate. A higher the traffic-to-pilot ratio implies a higher data rate.
  • Each mobile station 16 can be assigned a different REV_PDCH_MAX_AUTO_TPR s parameter. This enables the base station 19 to assign different maximum autonomous data rates to different mobile stations 16, if desired.
  • Another parameter that is sent from the base station 19 to the mobile station 16 regarding the autonomous mode of transmission is a flag to indicate whether autonomous mode is enabled.
  • the flag is named REV_PDCH_AUTO_ALLOWED s [i], where i is a service reference identifier (sr_id) to identify a service for which data is to be transmitted by the mobile station.
  • packet data that can be communicated by a mobile station 16 include packet data for a voice- over-IP service, a web browsing service, an e-mail service, a text chat service, a file download service, an interactive gaming service, and so forth. Multiple concurrent communications sessions for respective services can be set up by the mobile station 16. For each such service having a reference identifier sr_id x , the state of
  • REVJPDCH_AUTO_ALLOWED s [sr_id x ] is set (to logical "1" to indicate that autonomous mode transmission is enabled for the service having reference identifier sr_id x , and to logical "0" to indicate that autonomous mode transmission is disabled for the service having reference identifier sr_id x ).
  • autonomous mode may be enabled for an interactive gaming session, where the communication of data is relatively delay sensitive.
  • autonomous mode may be disabled for a file download session or web browsing session, since these types of data communications are less delay sensitive.
  • the base station 19 is able to send autonomous mode parameters, including REV_PDCH_MAX_AUTO_TPR s and REV_PDCH_AUTO_ALLOWED s [i], in various messages, which can be sent during a call setup procedure or at other times (such as after a call has been established and the mobile station is in an active state).
  • examples of such messages include an Extended Channel Assignment Message for assigning a channel to a mobile station.
  • Another message is a Service Connect Message (SCM), sent to establish a service instance either at call setup or during a call.
  • SCM Service Connect Message
  • UHDM Universal Handoff Direction Message
  • other messages can be employed to carry the autonomous mode parameters.
  • Such messages are sent in the forward wireless link from the base station to the mobile station.
  • each mobile station 16 includes a processor 42 and a storage 44.
  • the processor 42 provides a processing core on which one or more software modules are executable to enable the mobile station to perform various tasks.
  • the mobile station 16 includes buffers 46 for temporarily holding data that are to be communicated over the reverse wireless link to the base station 19.
  • the base station 19 also includes a processor 48 and a storage 50 (or multiple processors and storages).
  • the scheduler 40 can be a software module that is executable on the processor 48.
  • Fig. 2 illustrates a message flow diagram involving a base station and mobile station. Call setup messaging is initially exchanged (at 102) between the base station and the mobile station to establish a call.
  • the base station sends (at 104) an Extended Channel Assignment Message, which includes the REV_PDCH_MAX_AUTO_TPR s message, according to one implementation. Also, the base station sends (at 105) a Service Connect Message (SCM) to the mobile station.
  • SCM Service Connect Message
  • the Service Connect Message includes the REV_PDCH_AUTO_ALLOWED s [i]. Note that the Service Connect Message can also be transmitted from the base station to the mobile station after call setup has completed. This is usually performed to establish new service instances (to provide additional services) between the mobile station and the base station. Call setup need only be performed once, with the mobile station being able to provide multiple services in one call session.
  • the REV_PDCH_MAX_AUTO_TPR s and REV_PDCH_AUTO_ALLOWED s [i] messages can both be carried in the Extended Channel Assignment Message or in the Service Connect Message.
  • the received autonomous mode parameters are stored (at 106) by the mobile station 16.
  • the mobile station 16 next detects (at 108) that it has packet data to transmit over the reverse wireless link.
  • Packet data to be transmitted is stored in the buffers 46 (Fig. 1) of the mobile station 16. If the mobile station has established multiple sessions for multiple corresponding services, then the buffers 46 would contain packet data for the multiple sessions.
  • the base station can send (116) additional messages to the mobile station to either change the value of REV_PDCH_MAX_AUTO_TPR s and REV_PDCH_AUTO_ALLOWED s [i] for an existing service, or to set the value of REV_PDCH_MAX_AUTO_TPR s and REV_PDCH_AUTO_ALLOWED s [i] for new services.
  • one such message is the Service Connect Message.
  • the base station can send a Universal Handoff Direction Message (UHDM) to the mobile station, which is typically performed during a handoff procedure when the mobile station travels from one cell (or cell sector) to another cell (or cell sector).
  • UHDM Universal Handoff Direction Message
  • another message can be used to change the values of REV_PDCH_MAX_AUTO_TPR s andREV_PDCH_AUTO_ALLOWED s [i].
  • a message can be sent by the base station to the mobile station to increment or decrement the value of REV_PDCH_MAX_AUTO_TPR s by a predetermined amount.
  • Another message can also be sent by the base station to the mobile station for toggling the state of REV_PDCH_AUTO_ALLOWED s [i] .
  • an optional flag that can be sent from the base station to the mobile station is an AUTONOMOUS_SP_ENABLE_FLAG parameter, which is set to either a logical "1" or logical "0" state.
  • the AUTONOMOUS_SP_ENABLE_FLAG is communicated in one or more of the messages discussed above. If AUTONOMOUS_SP_ENABLE_FLAG is set to logical "1,” then the mobile station 16 can transmit in autonomous mode up to the autonomous maximum data rate (REV_PDCH_MAX_AUTO_TPR s ) regardless of occupancy of the buffers 46 (Fig. 1) in the mobile station 16.
  • AUTONOMOUS_SP_ENABLE_FLAG if the AUTONOMOUS_SP_ENABLE_FLAG parameter is set to logical "0," then the mobile station transmits in autonomous mode up to the autonomous maximum data rate only when the buffer occupancy is smaller than or equal to a predetermined size.
  • AUTONOMOUS_SP_ENABLE_FLAG being sent to logical "0" prevents the mobile station form transmitting in autonomous mode if there is too much data in the buffer to send. In this case, the mobile station will have to transmit the data in scheduled mode (by exchanging messaging with the scheduler 40 in the base station 19 to schedule an R-PDCH for transmitting the data over the reverse wireless link).
  • a base station 19 is unable to directly control through the use of data rate assignment messages the loading of the reverse wireless link. Therefore, according to an embodiment, a mechanism that takes into account the autonomous transmitting capability of mobile stations is provided to enable the scheduler 40 in the base station 19 to efficiently schedule usage of the air interface between mobile stations and the base station.
  • a mobile station not scheduled by the base station can transmit autonomously up to the maximum autonomous data rate, subject to the certain rules as described below in connection with Fig. 3.
  • a reverse request channel referred to as R-REQCH
  • R-REQCH is sent in the reverse wireless link from the mobile station to the base station to indicate the maximum data rate that is supportable by the mobile station.
  • This maximum supportable data rate information that is communicated in R-REQCH is used by the scheduler 40 to determine how much bandwidth is available for other communications (such as for other mobile stations).
  • a fixed time offset T2 is defined between the R-REQCH frame boundary (e.g., boundary 202) and the frame boundary of R-PDCH (e.g., boundary 204).
  • the R-REQCH information has to be communicated from the mobile station to the base station at least a time T2 prior to the mobile station actually transmitting the packet data over R-PDCH.
  • a further rule that is adhered to by mobile stations is that the data rate transmitted in a particular 10-ms (millisecond) period is based on the latest data rate reports (e.g., R0 or Rl shown in Fig. 3).
  • the data rate reports are sent at least a time offset TI prior to the transmission of the R-PDCH frame corresponding to the requested data rate.
  • the time offset TI provides sufficient time for the scheduler 40 to process the information communicated in R-REQCH so that appropriate scheduling can be performed.
  • the time offset T2 between the data rate reported in the reverse request channel R- REQCH and the data rate transmitted on R-PDCH allows time for the scheduler 40 in the base station 19 to provision for the amount of ROT (rise-over-thermal) or load in the reverse wireless link that is occupied by users transmitting in autonomous mode.
  • the remaining ROT or load available in the air interface is assigned to scheduled mode mobile stations.
  • ROT or rise-over-thermal, is defined as the ratio of total interference over thermal noise power.
  • ROT is basically a measure of the loading of the reverse wireless link. In other implementations, other measures of loading of the reverse wireless link can be used.
  • the scheduler 40 can also control the ROT or load of the reverse wireless link by setting values for the parameter REV_PDCH_MAX_AUTO_TPR s for the mobile stations in a cell or cell sector that are capable of transmitting in autonomous mode. To reduce the loading of the reverse wireless link, the scheduler 40 can reduce REV_PDCH_MAX_AUTO_TPR s for each mobile station. Reducing the loading of autonomous load transmissions provides greater bandwidth for other forms of transmissions in the reverse wireless link, such as scheduled mode transmissions.
  • control units or processors such as the processor 42 in the mobile station and the processor 48 in the MSC base station 19.
  • the control units or processors include microprocessors, microcontrollers, processor modules or subsystems
  • controller refers to hardware, software, or a combination thereof.
  • a “controller” can refer to a single component or to plural components (whether software or hardware).
  • Data and instructions are stored in one or more machine-readable storage media, such as storage 44 in the mobile station 16 and storage 50 in the base station 19.
  • the storage media include different forms of memory including semiconductor memory devices such as dynamic or static random access memories (DRAMs or SRAMs), erasable and programmable read-only memories (EPROMs), electrically erasable and programmable read-only memories (EEPROMs) and flash memories; magnetic disks such as fixed, floppy and removable disks; other magnetic media including tape; and optical media such as compact disks (CDs) or digital video disks (DVDs).
  • DRAMs or SRAMs dynamic or static random access memories
  • EPROMs erasable and programmable read-only memories
  • EEPROMs electrically erasable and programmable read-only memories
  • flash memories magnetic disks such as fixed, floppy and removable disks
  • other magnetic media including tape and optical media such as compact disks (CDs) or digital video disks (DVDs).
  • the instructions of the software routines or modules are loaded or transported to a system in one of many different ways. For example, code segments including instructions stored on floppy disks, CD or DVD media, a hard disk, or transported through a network interface card, modem, or other interface device are loaded into the system and executed as corresponding software routines or modules.
  • data signals that are embodied in carrier waves (transmitted over telephone lines, network lines, wireless, links, cables, and the like) communicate the code segments, including instructions, to the system.
  • carrier waves are in the form of electrical, optical, acoustical, electromagnetic, or other types of signals.

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

Abstract

Réseau de télécommunications sans fil comprenant une station mobile et une station de base fournissant un indicateur de taux de données autonomes supportables à travers une liaison sans fil inversée reliant la station mobile à la station de base. La station mobile et la station de base fournissent également un indicateur permettant de signaler si le mode autonome est activée pour la station mobile. En réponse à l'indicateur signalant l'activation du mode autonome, des données sont transmises sur la liaison sans fil inversée, à un taux de données inférieur ou égal au taux de données autonomes, sans que la station n'ait d'abord à programmer la station mobile.
PCT/IB2004/001004 2003-03-06 2004-03-05 Transmission en mode autonome a partir d'une station mobile WO2004080086A2 (fr)

Applications Claiming Priority (24)

Application Number Priority Date Filing Date Title
US45237003P 2003-03-06 2003-03-06
US60/452,370 2003-03-06
US45471403P 2003-03-15 2003-03-15
US60/454,714 2003-03-15
US45721503P 2003-03-25 2003-03-25
US60/457,215 2003-03-25
US45953403P 2003-04-01 2003-04-01
US60/459,534 2003-04-01
US46222003P 2003-04-11 2003-04-11
US60/462,220 2003-04-11
US46844203P 2003-05-06 2003-05-06
US60/468,442 2003-05-06
US46910603P 2003-05-09 2003-05-09
US60/469,106 2003-05-09
US46977803P 2003-05-12 2003-05-12
US60/469,778 2003-05-12
US47544003P 2003-06-03 2003-06-03
US60/475,440 2003-06-03
US47879203P 2003-06-16 2003-06-16
US60/478,792 2003-06-16
US49554403P 2003-08-15 2003-08-15
US60/495,544 2003-08-15
US49958403P 2003-09-02 2003-09-02
US60/499,584 2003-09-02

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WO2004080086A3 WO2004080086A3 (fr) 2005-01-20

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WO2007056182A1 (fr) * 2005-11-04 2007-05-18 Intel Corporation Amelioration de debit de liaison montante pour des interfaces de reseau sans fil
EP1797659A2 (fr) * 2004-10-01 2007-06-20 Nokia Corporation Mac-e lent pour emission autonome dans un acces de paquets de ligne montante haute vitesse (hsupa) avec commande temporelle d'emission specifique de service

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WO2002035735A2 (fr) * 2000-10-24 2002-05-02 Nortel Networks Limited Structure de canal partage, systemes et methodes de correction automatique d'erreurs par repetition (arq)
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EP1643694A2 (fr) * 2004-09-30 2006-04-05 Samsung Electronics Co., Ltd. Procédé et dispositif pour la transmission non programmée de données en sens montante dans un système de communication mobile
EP1643694A3 (fr) * 2004-09-30 2008-10-08 Samsung Electronics Co., Ltd. Procédé et dispositif pour la transmission non programmée de données en sens montante dans un système de communication mobile
EP1797659A2 (fr) * 2004-10-01 2007-06-20 Nokia Corporation Mac-e lent pour emission autonome dans un acces de paquets de ligne montante haute vitesse (hsupa) avec commande temporelle d'emission specifique de service
EP1797659A4 (fr) * 2004-10-01 2011-12-28 Nokia Corp Mac-e lent pour emission autonome dans un acces de paquets de ligne montante haute vitesse (hsupa) avec commande temporelle d'emission specifique de service
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EP2866491B1 (fr) 2004-10-01 2019-02-27 Conversant Wireless Licensing S.à r.l. MAC-E lente pour une transmission autonome dans un accès par paquets en liaison montante haute vitesse (HSUPA) conjointement avec une commande de temps de transmission spécifiques à un service
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US7499426B2 (en) 2005-11-04 2009-03-03 Intel Corporation Uplink throughput for wireless network interfaces
JP2009515483A (ja) * 2005-11-04 2009-04-09 インテル コーポレイション 無線ネットワークインタフェースの上りリンクスループットの改善
US7826404B2 (en) 2005-11-04 2010-11-02 Intel Corporation Dynamic packet error management for wireless communications
JP4855476B2 (ja) * 2005-11-04 2012-01-18 インテル コーポレイション 無線ネットワークインタフェースの上りリンクスループットの改善

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